In late December, the 21st to be exact, my friends Amos and Clara called me 17 times. On December 22 it was eight times. The calls were short—sometimes only 30 to 45 seconds, and they usually arrived ...

Kara Alaimo is a professor of communication at Fairleigh Dickinson University and teaches parents, students and teachers how to manage screen time. Her book “Over the Influence: Why Social Media Is ...